Take a stroll or enjoy a picnic in Hermann Park . Photo-3706757.76720 - Houston Chronicle

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Free afternoons at the Houston ZooFirst Tuesdays of the month from noon-close, Sept. through MayFREE

From September until May, enjoy free afternoons at the zoo. This applies to admission only and does not include the carousal, giraffe feeding, Zoo lights and other events/attractions. less

Free afternoons at the Houston Zoo
First Tuesdays of the month from noon-close, Sept. through May
FREE

From September until May, enjoy free afternoons at the zoo. This applies to admission only and does not ... more

Photo: Courtesy Photo / Houston Zoo

Free afternoons at the Houston Zoo First Tuesdays of the month... Photo-9394646.76720 - Houston Chronicle

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Critical Mass at Market Square ParkLast Friday of the month at 7 p.m.FREE

This informal bike riding group takes a ride around the city during the last Friday of the month to raise awareness for bicycle-friendly urban environments. All types of bicycles are welcome. Click here for more information. less

Critical Mass at Market Square Park
Last Friday of the month at 7 p.m.
FREE

This informal bike riding group takes a ride around the city during the last Friday of the month to raise awareness for bicycle-friendly ... more